Battery Pack Lead Layout and Cooling for Switch Heat Dissipation
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Solution Overview
Problem
Existing battery packs face challenges in efficiently dissipating heat from switch devices and optimizing the electrical connection structure, which can lead to reduced performance and reliability, especially in high-power applications.
Innovation Solution
The battery pack incorporates a novel arrangement of leads connected to electrodes, a cooling fluid flow within an accommodation space, and a switch device placement strategy to enhance heat dissipation and electrical connectivity, including a barrier wall to manage the cooling fluid flow and a specific configuration of leads and tab plates for efficient electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If leads are arranged to connect multiple tab plates, then electrical connectivity is improved, but electrical interference between leads increases
Solution Approach 1:
The patent transitions from planar lead arrangement to three-dimensional spatial arrangement by routing leads through different layers and directions within the battery pack. Leads are positioned at different heights and angles, transforming a two-dimensional connection problem into a three-dimensional solution that reduces electromagnetic interference while maintaining electrical connectivity.
Solution Approach 2:
The patent employs asymmetric lead routing where positive and negative leads follow different paths and are positioned non-uniformly within the battery pack. This asymmetric arrangement breaks the symmetry that would otherwise create balanced electromagnetic interference patterns, thereby reducing overall electrical interference while ensuring reliable electrical connections between tab plates and external terminals.
2Adaptability or versatility
If switch device is placed in the battery pack, then electrical control functionality is improved, but heat dissipation becomes more difficult
Solution Approach 1:
The patent extracts the heat dissipation function from the general battery environment by providing a dedicated cooling channel specifically for the switch device. The cooling channel is separated from the main battery cell arrangement, allowing independent thermal management of the switch device without affecting the overall battery pack structure or the thermal environment of the battery cells.
Solution Approach 2:
The patent introduces a cooling fluid as an intermediary medium between the switch device and the external environment. The cooling fluid flows through the dedicated cooling channel, absorbing heat from the switch device and transporting it away, thereby enabling effective heat dissipation while maintaining the electrical control functionality of the switch device within the battery pack.
3Temperature
If cooling fluid is accommodated with battery cells, then heat dissipation from battery cells is improved, but space for electrical components is reduced
Solution Approach 1:
The patent segments the cooling function by providing separate cooling channels: one for battery cells and another dedicated cooling channel for the switch device. This segmentation allows the cooling fluid to serve multiple functions simultaneously without requiring a single large accommodation space, thereby maintaining heat dissipation efficiency while creating dedicated spaces for electrical components.
Solution Approach 2:
The patent utilizes three-dimensional space optimization by routing cooling channels and electrical components in different spatial dimensions. The cooling fluid flows through channels positioned in specific layers and directions, while electrical components are arranged in complementary spaces, effectively utilizing vertical and lateral dimensions to accommodate both cooling requirements and electrical components without mutual interference.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves heat dissipation from the switch device and optimizes electrical connections, leading to enhanced performance and reliability of the battery pack, particularly in high-power applications by reducing electrical interference and increasing the efficiency of the cooling process.
Implementation Method 1
a cooling fluid to cool the battery cells
Implementation Method 2
dissipate heat from the switch device more efficiently by using a flow of a cooling fluid
Data Source
AI summary
A battery pack includes: battery cells, each including first and second end portions that are opposite each other in a length direction; a case having an accommodation space in which the battery cells and a fluid to cool the battery cells are configured to be accommodated, the case including first and second covers respectively covering the first and second end portions; first and second tab plates respectively on the first and second covers and connected to the first and second end portions; a circuit board on the first tab plate; and a first lead and a second lead through which the first and second tab plates are connected to the circuit board, the first and second leads connected to a first side portion of the circuit board. An arrangement of the leads connected to electrodes of the battery cells is improved, and heat is efficiently dissipated from a switch device.